Volvo-Checking /Replacing Engine Sea Water Pump Impeller - Regal 3760 Owner's Manual

Volvo-Checking /Replacing Engine Sea Water Pump Impeller

4 Bolts
Raw Water
Pump
Always carry an extra water pump impeller. They are
available through your Regal dealer or Volvo repair center.
It is a good idea to carry a 1/4" drive socket set in both
metric and US units along with a torque wrench with an
adapter socket. You will find it very useful in tight spots
such as the water pump bolts.
Note: This repair is best done as a preventative
maintenance item out of the water. In an emergency be
sure to plug the raw water hoses with rags to prevent the
vessel from possible sinking.
1. Loosen the hose clamps and remove the hoses from
the sea water pump. Sometimes the hoses are seated so it
may be necessary to run an object such as a screwdriver
around the hose to break it free from the housing.
2. Loosen the 4 screws and remove the housing.
3. Check the impeller for cracks, melted or missing blades.
4. Inspect the O ring for any signs of wear, nicks or cuts.
5. Check the housing for deep grooves whch may cause
the impeller to lose its prime.
Impeller
Water Pump
Housing
6. Lubricate the pump housing with a non-petroleum
based lubricate such as glycerine.
7. Reinstall the impeller in the housing.
8. Lubricate the O ring housing groove. Reinstall the O
ring making sure it is seated completely.
8. Install the housing. Line up the bolt holes.
9. Reinstall the housing bolts. Torque as required. Do not
overtighten.
10. Install the hoses and hose clamps. Tighten the hose
clamps.
11. In the water start the engine and check for leaks.
54
Chapter 8
O Ring